Composition for treating molds used in the electrotyping art.



' on the face of the mold in the form of a .ticles from being removed by any of the very troublesome and annoying to the election with the black lead used in the so-called nITED sTArEs PKTENT OFFICE GEORGE E. Donavon, on NEW YORK, N. Y.

CEOIll/[POSI'IION' FOR TREATING MOLDS USED IN THE ELECTROTYPING ART.

No Drawing.

To all whom it may concern:

Be it known that I, GEORGE E. DUNTON, residing at New York, county of New York, State of New York, a citizen of the United- States, have invented certain new and useful Improvements in Composition for Treating Molds Used in the Electrotyping Art; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The material for forming molds used in printing plates is commonly made of some substance such as beeswax, ozocerite wax or like material which contains an appreciable percentage of grease, oil or oily substance in their composition. WVhen pressure is applied to the form or cut in making the imv pression in the mold, it causes the grease or oily substance to be forced o t and appear thin coating or film, said coating-or film is trotyper as it causes imperfect and faulty reproductions, especially in case where the so-called half tone illustrations are being made which are composed or made up of a collection of very fine points or dots. The black leads used in the art of electrotyping are amorphous and very hygroscopic, consequently when applied tothe surface ofthe wax mold having thereon the film of grease, oil or oily substance the minute particles of lead attractand become impregnated with this grease, oil or oily substance, thus adhering to the surface of the wax mold and hold one particle to the other so far as the influence of the grease, oil or oily substance is manifest and preventing the surplus parcommon operations by which these molds are now treated.

My invention relates to a new and useful composition for curing the above mentioned fault, adapted especially for use in connecoperation of polishing, the surface of the wax molds, by rendering the black lead im-- pervaous to theaction of the grease, oil or olly substance which is present upon the surfader of the wax mold by incorporating the blackdead with said composition, which permlts an surplus particles of the black vSpecification of Letters Patent.

Patented May 23, 1911.

Application filed September 6, 1910. Serial 210,580,540.

lead, vhich have not been actually retained by and l ave not adhered to the surface of the wax, removed by any of the well known and commonly used methods of washing or pumping out the molds.

This composition of matter may be applied to the surface of the wax mold by hand, with a brush ormechanically by squirting it over the surface of the wax mold as with a pump through a hose and suitable nozzle.

The composition consists of the following ingredients in about the proportion stated Water 1 gallon Caustic soda 1 ounce Caustic potash ounce Black lead, 2 pounds- C-lycerin 4 ounces In compounding the composition, I first provide a suitable receptacle and pour into I the same one gallon of water, to this Water I add four ounces of glycerin stirring the mixture until the glycerin has dissolved or mixed thoroughly with the water, I then stir in the two pounds of black lead adding the one ounce of caustic soda and the onehalf ounce of caustic potash at the same; time, stirring the whole until the two latten have dissolved when the mixture is ready for use.

If the composition is to be used by hand, with a ,brush, a shallow pan preferably lined with copper or lead is provided having two cleats of wood laid across the bottom on the inside to support the mold in a'horizontal position, face up. The mixture may be poured directly into this shallow pan or tray or placed in any suitable receptacle, from which it may be dipped out with the brush used for spreading it over the surface of the wax mold.

If used in a machine, of which there are many suitable forms or types, the mixture is placed within thetank reservoir of the ,machine, the mold placed in the machine which is started and the mixture is pumped or squirted over the surface of the wax" mold until the said'surface has become polished.

The surplus lead, that which has ,Iiot actuallyicome in contact with and adhered to the surface of the wax, is washed away.

I do not wish to confine myself to the ex act proportion of each ingredient as stated. as they may be varied, and other combinations ma be made to produce the same re- I Correction In Letters Patent No. 993,157., i

caustic soda one ounce, caustic potash onesults an still come within the scope and half ounce, black lead two pounds, and lyc- .spirit of my invention. I have specified 'erin four ounces, substantially as descrlbed. two caustic alkalis on account of their en- Intestimony whereof, I' have hereunto set ergetic action and their solubility in methyl ,my hand and afiixed my alcfihol-hbut sfome1 of the;1 other salts, esple -presence of two witnesses. cia t ose 0 so ium an potassium wou pro uce tactically the same results. GEORGE U T What i claimisz A composition for treating wax electrotype molds comprising water one gallon,

15 signature in the.

Witnesses:

LEoNARo H. WARREN, WILEYDWARE.

it i; ha-a -cmmgag thu in Letters Patent No. 993,157, granted May 2, 191;1, I upoii'the application-of George E. Danton, of New York, N. Y., for an iluprovement in ficomposition for Treating Molds Used m the E|eet1otyp1ng !Al-t,. an error appears the printed specification requiring correction as follows: Page 1, line 74 the Clycerin should read Glycefin; and that the said Letters Patent ,v I i I should read with this correction therein that the same may conform to the record ofv the case in'the' Patent Oflice, p Signed and sealed this 1st day of August, A. D.,'19i1. [snAL i it E. MOORE,

of Patents.

tions ma be made to produce the same re- I Correction In Letters Patent No. 993,157., i

caustic soda one ounce, caustic potash onesults an still come within the scope and half ounce, black lead two pounds, and lyc- .spirit of my invention. I have specified 'erin four ounces, substantially as descrlbed. two caustic alkalis on account of their en- Intestimony whereof, I' have hereunto set ergetic action and their solubility in methyl ,my hand and afiixed my alcfihol-hbut sfome1 of the;1 other salts, esple -presence of two witnesses. cia t ose 0 so ium an potassium wou pro uce tactically the same results. GEORGE U T What i claimisz A composition for treating wax electrotype molds comprising water one gallon,

15 signature in the.

Witnesses:

LEoNARo H. WARREN, WILEYDWARE.

it i; ha-a -cmmgag thu in Letters Patent No. 993,157, granted May 2, 191;1, I upoii'the application-of George E. Danton, of New York, N. Y., for an iluprovement in ficomposition for Treating Molds Used m the E|eet1otyp1ng !Al-t,. an error appears the printed specification requiring correction as follows: Page 1, line 74 the Clycerin should read Glycefin; and that the said Letters Patent ,v I i I should read with this correction therein that the same may conform to the record ofv the case in'the' Patent Oflice, p Signed and sealed this 1st day of August, A. D.,'19i1. [snAL i it E. MOORE,

of Patents.

It is hereby certified that in Letters Patent No. 993,157, granted May 25'], 1911, upon the appiication of George E. Dnnton, of New York, N. Y., for an improvement in Composition for Treating Molci s Used in the Eleotrotyping Art, an error appeers in the printed specification requiring correction as follows: Page 1, line 74, the vrord Glycerin should read Glycerin, and that thesaid Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. 7

Signed and sealed this let day of August, A. D.,191 1.

[am] E. B. MOORE,

Cofizmissioner 0 Patents. 

